Which cybersecurity innovation revolutionized anti-piracy efforts in movie theaters around 2010-2015?

The film exhibition industry has undergone massive digital transformation in the past two decades, shifting from physical film reels to digital projection systems and online ticketing. With this shift came new cybersecurity challenges to protect not only unreleased content but also customer data. Test your knowledge about how movie theaters have adapted their security measures in the digital age!

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Digital watermarking technology that embeds invisible theater-specific codes into projected content
Infrared camera systems that detect all recording devices in the audience
Radio frequency jammers that disable all electronic devices during screenings
Blockchain verification requiring viewers to validate their identity before each showing